I cannot place or receive any phone calls and all updates are done
I can’t receive or place any phone calls and my updates are complete
iPhone 12 Pro Max, iOS 15
Question marked as
Try first to optimize the range of the mobile network, see this Apple article:
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad - Apple Support
See this Apple article: If you can't make or receive calls on your iPhone
If you can't make or receive calls on your iPhone - Apple Support
See also these Apple articles below:
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support
Update your network provider settings manually on your iPhone or iPad
Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)